33results about How to "Speed up sorting" patented technology

The invention relates to an integrated terahertz superstructure nano-biochip as well as an application and a method thereof. The integrated terahertz superstructure nano-biochip comprises a micro-fluidic filter membrane sorting chip structure and a THz superstructure signal detection module, wherein the micro-fluidic filter membrane sorting chip structure and the THz superstructure signal detection module are connected by virtue of a channel which is provided with a barrier valve; the chip, which combines the principles of filter membrane sorting and antibody capture immobilization, has the advantages of being high in sorting efficiency and high in sorting speed; and by designing a micro-fluidic lumen and a terahertz superstructure detection array of specific size, and through a method of displacing ambient water molecules by fluorocarbon oil, the sensitivity of detection can be greatly improved, and the chip is applicable to THz detection of circulating tumor cells (CTCs); and the chip has important significance to integrated, automatic and portable detection of the CTCs.

The invention relates to a method for separating secondary batteries. The method comprises the following steps: (1) selecting a batch of secondary batteries in a full energy state, placing the batch of secondary batteries in a charge-discharge detection device for a lithium ion battery, discharging the secondary batteries in a 3C-10C rate, and recording discharge data by using a computer; (2) setting the low limit of discharge time according to the capacity range of the selected secondary batteries, and classifying the batteries with the discharge time longer than the low limit of discharge time according to a setting range; (3) setting a low limit discharge platform or a low limit mid-value voltage for the selected secondary batteries in the capacity range according to needs to obtain the batteries more than the low limit discharge platform or the low limit mid-value voltage; and (4) carrying out internal resistance separation on the batteries obtained in step (3), and selecting the batteries with satisfactory internal resistances. After the technical scheme is adopted, a separation process is simplified, separation equipment is reduced, the separation speed is increased and the separation quality is improved, the production cost is reduced, and the production efficiency is improved.

The invention provides a hyperspectral band selection method based on separable convolution and hard threshold function, which solves the problems of poor band selection performance, poor classification accuracy and long time consumption of hyperspectral image. The method comprises the following steps of inputting a hyperspectral image; generating training and test samples; constructing a convolution neural network including band selection layer, spatial-spectral joint information and classifier, obtaining the optimized convolution neural network by training; classifying hyperspectral images by using the trained convolution neural network based on band selection. The method of the invention constructs the convolution neural network based on band selection, builds a band selection layer based on separable convolution and hard threshold function in the network structure, realizes the integration of band selection and classification, and overcomes the problems of low classification precision and slow speed caused by the separation of the band selection and the hard threshold function. The learning ability of network features is used to improve the performance of band selection and classification accuracy. The method is widely used in military, civil, agriculture, ecology and other fields.

The invention relates to a fresh fruit sorting device and method and application thereof. The device comprises a color sorting assembly and a screening assembly, wherein the screening assembly is located below the color sorting assembly. Fresh fruits are subjected to color sorting through the color sorting assembly, parts of the fresh fruits are discharged through a first discharge port in the color sorting assembly, and the other parts of the fresh fruits are conveyed to the screening assembly for size sorting after impurities are removed through a rolling shaft conveying belt in the color sorting assembly. According to the fresh fruit sorting device and method and the application thereof, the combination of color sorting and screening can be used for effectively screening the fresh fruits at a time, the error caused by manual visual inspection is greatly reduced, and the quality is improved; the fresh fruit sorting and grading processes of the device are more convenient and reliable, the sorting speed is increased, and the device has lower energy consumption and cost compared with a traditional air pressure sorting mechanism; a single-time multi-index fresh fruit screening is realized through the device, and the redundant design of a traditional sorting machine is avoided; and the impurities in the fresh fruits can be effectively removed while the fresh fruits are screened, and thus the device has a good screening effect.

The invention discloses a silicon chip crystal flower sorting machine. The silicon chip crystal flower sorting machine comprises a feeding mechanism, a detecting mechanism and a discharging mechanism,and further comprises a detection site delivering mechanism, a sunshade hood, a silicon chip sorting and removing mechanism and an automatic switchover material box mechanism, wherein the feeding mechanism comprises a feeding chip grasping mechanism, a stacked silicon chip material box mechanism, a feeding site delivering mechanism and a feeding and jacking mechanism. The silicon chip crystal flower sorting machine disclosed by the invention can greatly improve sorting speed and efficiency, increase sorting accuracy, significantly reduce fragment rate and increase economic benefits.

The invention provides a method for sorting batteries by sucker-type electromagnets for the society. The upper part of each pre-classified battery (4) corresponds to a sucker-type electromagnet (1); a current pre-classified battery (5) is firmly attracted by a magnetic filed generated by an electrified sucker-type electromagnet and vertical to a moving installation plate (2) or a battery turnover tray (3) at the time; and the current pre-classified battery (5) is separated from the battery turnover tray (3) and other pre-classified batteries (4). The method for sorting batteries by sucker-type electromagnets has the advantages of simple structure, low cost, high sorting speed and the like and can avoid the mistaken sorting caused by the artificial misoperation, thereby improving the sorting speed and the sorting quality of the batteries.

The invention discloses a lotus seed shelling device. The device comprises an impurity removing device, a lotus seed sorting device and a lotus seed shell grinding device. The impurity removing devicecomprises a sediment removing and conveying channel and an impurity winnowing mechanism, a lifting mechanism is arranged on one side of the impurity sorting mechanism, a lotus seed sorting device isarranged below a discharging port at the upper end of the lifting mechanism, and the lotus seed sorting device comprises a support, a multilayer sorting sieve, a sliding mechanism and a discharging mechanism; the arranged multilayer sorting sieve can divide lotus seeds into multiple size grades for grinding and shelling, so that the lotus seeds are thoroughly shelled; the lotus seeds can roll backand forth in the multilayer sorting sieve, and the sorting speed of the lotus seeds is increased; the arranged support is inclined downwards, so that the lotus seeds can be naturally conveyed from right to left instead of being conveyed by a power conveying device; pre-tightening force applied by a press roll on lotus seeds can be adjusted, so that the lotus seeds are thoroughly shelled; and impurities cannot stick to surfaces of lotus seeds after shelling of the lotus seeds.

The invention discloses a method for screening abamectin high-yield strain in high throughput based on a flow cytometry, belonging to the technical field of high-troughput screening. The method comprises the following steps: performing PI dyeing method on mutated spores with different activities, correctly distinguishing a spore area with activity by regulating and optimizing various parameters such as FSC, SSC and voltage threshold, and excluding the interference mixed with the background in flow cytometry detection due to oversmall volume of spores. The screened live spores are subjected to a solid-liquid combined high-throughput culturing scheme to effectively improve the growth rate of an abamectinpore plate. According to the invention, the abamectin with activity can be screened based on the flow cytometry, and a novel and effective manner is provided for the high-throughput screening of abamectin.

The invention relates to fine sorting equipment for solid waste, and belongs to the technical field of architectural decoration and finishing waste recycling. A nozzle row set is fixedly mounted on arotary shaft, the rotary shaft is rotationally mounted on a mounting rack, and a bevel gear is coaxially and fixedly mounted on the rotary shaft. A bevel tooth column is rotationally mounted on the mounting rack and engaged with the bevel gear. A driving assembly drives the bevel tooth column to rotate, and the bevel tooth column drives the bevel gear to rotate; the bevel gear drives the rotary shaft to rotate, and the rotary shaft drives the nozzle row set for angle adjustment; the angle of the nozzle row set can be adjusted, and airflow sprayed out of nozzles can be sprayed to architecturaldecoration and finishing waste on a belt conveyor at different angles; and the waste is sorted thoroughly, and the sorting efficiency is high. The height of the nozzle row set can be adjusted and canbe suitable for belt conveyors with different heights, and the magnitude of acting force of the airflow sprayed out of the nozzles on the waste is controlled by adjusting the distance between the nozzles and the architectural decoration and finishing waste.

A particle manipulation system uses a MEMS-based, microfabricated particle manipulation device which has an inlet channel, output channels, and a movable member formed on a substrate. The movable member moves parallel to the fabrication plane, as does fluid flowing in the inlet channel. The movable member separates a target particle from the rest of the particles, diverting it into an output channel. However, at least one output channel is not parallel to the fabrication plane. The device may be used to separate a target particle from non-target material in a sample stream. The target particle may be, for example, a stem cell, zygote, a cancer cell, a T-cell, a component of blood, bacteria or DNA sample, for example. The particle manipulation system may also include a microfluidic structure which focuses the target particles in a particular portion of the inlet channel.

The invention relates to a chip turning device for a surface-mounted device (SMD) light-emitting diode (LED) patch light splitting machine, comprising a support plate, and a lifting mechanism, a turning mechanism, a chip absorbing device and a detection device which are arranged on the support plate; the lifting mechanism comprises a cylinder and a lifting platform; a piston rod of the cylinder is connected with the lifting platform; the turning mechanism comprises an electric motor, an angle turntable, a coupler and a rotating shaft; the electric motor is fixedly connected with the support plate through an electric motor fixing plate; an output shaft of the electric motor passes through the angle turntable and is connected with one end of the coupler; the other end of the coupler is matched and connected with one end of the rotating shaft; the other end of the rotating shaft passes through the lifting platform and is provided with the chip absorbing device; and the detection device is arranged at the front part of the chip turning device of the SME LED patch light splitting machine. The invention is the special chip turning device which is used for rotating a chip of which an electrode direction needs to be changed for 180 degrees, and has the characteristics of high separation speed, high test efficiency, simple structure and simplicity in operation.

The invention discloses a weighing and sorting device for lithium battery pole pieces. The device comprises a weighing tray, a base and an infrared ranging instrument, wherein a controller is arrangedat one end of the top part of the base, and the bottom end of the top part of the base is rotatably connected to a conveyor belt through a rotating shaft; a sensor frame is welded on the top part ofthe base and is close to the middle part of the conveyor belt; and the infrared ranging instrument is arranged in the inner center of the sensor frame. According to the weighing and sorting device forthe lithium battery pole pieces, the infrared ranging instrument is arranged on the top part of the conveyor belt; the thickness of the pole pieces is fixed, so that the quantity of the pole pieces can be determined by measuring the thickness of the pole pieces, and then whether the weight meets standard can be determined based on the quantity; with the adoption of the abovementioned sorting mode, a plurality of pole pieces can be synchronously weighed, so that the sorting efficiency is extremely improved; and moreover, no requirements are proposed to the quantity of the pole pieces, so thatthe sorting speed is further increased.

The invention belongs to the field of express processing equipment, particularly relates to an express sorting device convenient to operate, and aims to solve the problems that according to an existing express sorting line, sorting can only be carried out according to the size of a single group item, a sorting structure on each line is fixed, sorting instructions cannot be switched, new sorting requirements cannot be met, and sorting lines need to be laid additionally. According to the technical scheme, the express sorting device comprises a bottom plate, two frame plates are fixedly installed at the top of the bottom plate, two conveying rollers are fixedly installed on the two frame plates, a plurality of conveying belts are in transmission connection with the two conveying rollers, a motor is fixedly installed on one side of each frame plate, and an output shaft of the motor is fixedly connected to the conveying rollers. A first mounting seat is fixedly mounted at the top of the bottom plate. The express sorting device is reasonable in structure and convenient to operate, the sorting size of the express item sorting line can be adjusted according to the needed size, the sorting structure is flexible, various sorting requirements can be met, and the sorting efficiency is higher.

The invention belongs to the technical field of tea leaf processing technologies and in particular relates to a processing technology of green tea. The technology comprises the following steps: spreading tea leaves on a spreading machine in a spreading room for 5 to 8h; setting the spreading machine to automatically overturn the leaves for one time every hour; meanwhile, mounting an air exhaust fan on a wall of the spreading room to ensure ventilation of the spreading room; carrying out fixation on the tea leaves by utilizing a roller fixation machine; passivating the activity of an enzyme through a high-temperature manner, so as to damage tissues and structures in the tea leaves to change the property of fresh leaves, and improve the quality of the tea leaves; stirring and frying the tealeaves through tea leaf screening, stirring and frying equipment to dissipate water steam and grass gas in the tea leaves, so as to enable the tea leaves to be easily stored; sealing and packaging thetea leaves through a tea leaf packaging machine to separate the tea leaves from external air, so as to prevent the quality of the tea leaves from being influenced and enable the tea leaves to be preserved for long time. The processing technology of the green tea is applicable to large-scale processing of the green tea and the processed green tea has good quality.

The invention relates to the technical field of cutting devices, in particular to an automatic mechanical cutting device and a using method thereof. The device comprises a cutting mechanism, the cutting mechanism at least comprises a cutting body, the cutting body comprises a cutting table, a fixing rod is installed on the surface of the cutting table through block plates symmetrically arranged at the ends, the surface of the fixing rod is rotationally connected with a tool rest, a cutting tool is arranged in the tool rest, a tool handle is installed at one end of the tool rest, and a return plate is installed below the tool handle through an upper spring; and the automatic transmission body comprises a fixing frame installed on the cutting table, one end of the fixing frame is rotationally connected with a wheel disc, one end face of the wheel disc is rotationally connected with a wheel disc motor, and a guide rod is installed at one end of the surface of the wheel disc. According to the automatic material cutting device, automatic material cutting operation can be conducted on small or fragile materials, manpower is saved, and waste of resources is reduced.

The invention discloses a method for high throughput screening of a chlortetracycline high-yield strain based on flow cytometry, and belongs to the technical field of high throughput screening. According to the method disclosed by the invention, by virtue of a PI streptomyces aureofaciens spore staining method, the activity of streptomyces aureofaciens spores is detected through flow cytometry, so that activity distinguishing and absolute counting of the streptomyces aureofaciens spores are achieved. A living spore group, obtained from analysis, is further sorted and cultivated, so that a mode is provided for the high throughput screening of the streptomyces aureofaciens. With the adoption of a solid-liquid combining high throughput cultivation scheme on the sorted living spores, the growth rate of a streptomyces aureofaciens pore plate is effectively improved. A chromogenic reaction and porous plate detection method, as a convenient and rapid detection means, is capable of simultaneously detecting a great amount of samples. The method, which sorts the active streptomyces aureofaciens based on the flow cytometry, provides a novel and effective mode for the high-throughput screening of the streptomyces aureofaciens high-yield strain.

The embodiment of the invention discloses a database-based ship workpiece statistical method and device, equipment and a medium. The method comprises the following steps of obtaining an intermediate database containing a plurality of workpiece objects to be processed from a set design and manufacturing total database according to an engineering number; obtaining a preset segment number based on the project number, and grouping the to-be-processed workpiece models in the intermediate database through the preset segment number to obtain at least one group of object sets; aiming at each group of object sets, analyzing the workpiece objects one by one, and obtaining a workpiece name and attribute information corresponding to each workpiece object; and obtaining workpiece names and attribute information of all workpiece objects in the intermediate database, and displaying a statistical result according to a preset segment number, the workpiece names and the attribute information. According to the method, the data is directly extracted from the database, manual one-by-one statistics is not needed, the statistical duration of the workpieces is shortened, the accuracy rate is improved, grouping processing is carried out according to the preset segment number, and the data processing and statistical result arrangement rate is improved.

A particle manipulation system uses a MEMS-based, microfabricated particle manipulation device which has an inlet channel, output channels, and a movable member formed on a substrate. The movable member moves parallel to the fabrication plane, as does fluid flowing in the inlet channel. The movable member separates a target particle from the rest of the particles, diverting it into an output channel. However, at least one output channel is not parallel to the fabrication plane. The device may be used to separate a target particle from non-target material in a sample stream. The target particle may be, for example, a stem cell, zygote, a cancer cell, a T-cell, a component of blood, bacteria or DNA sample, for example. The particle manipulation system may also include a microfluidic structure which focuses the target particles in a particular portion of the inlet channel.

The invention relates to a chip turning device for a surface-mounted device (SMD) light-emitting diode (LED) patch light splitting machine, comprising a support plate, and a lifting mechanism, a turning mechanism, a chip absorbing device and a detection device which are arranged on the support plate; the lifting mechanism comprises a cylinder and a lifting platform; a piston rod of the cylinder is connected with the lifting platform; the turning mechanism comprises an electric motor, an angle turntable, a coupler and a rotating shaft; the electric motor is fixedly connected with the support plate through an electric motor fixing plate; an output shaft of the electric motor passes through the angle turntable and is connected with one end of the coupler; the other end of the coupler is matched and connected with one end of the rotating shaft; the other end of the rotating shaft passes through the lifting platform and is provided with the chip absorbing device; and the detection device is arranged at the front part of the chip turning device of the SME LED patch light splitting machine. The invention is the special chip turning device which is used for rotating a chip of which an electrode direction needs to be changed for 180 degrees, and has the characteristics of high separation speed, high test efficiency, simple structure and simplicity in operation.

The single-piece feeding and sorting system comprises a single-piece feeding device, a size detection device and a single-piece sorting device, the single-piece feeding device comprises a material storage frame, a first blocking piece and a second blocking piece are arranged at the bottom of the material storage frame, and the first blocking piece and the second blocking piece are obliquely arranged and form an opening which is gradually narrowed from top to bottom; a vacuum chuck and a guide baffle are arranged below the opening, a through hole is formed in the middle of the guide baffle, the vacuum chuck is driven by a driving mechanism, and the driving mechanism is used for driving the vacuum chuck to move above the through hole or in the vertical direction of the through hole; and a conveyor is arranged at the lower end of the guide baffle and is used for conveying the reed leaves to the size detection device and the single-piece sorting device in sequence. The functions of feeding and sorting the reed leaves one by one are achieved, the reed leaves of at least two sizes can be sorted according to use requirements, and compared with manual sorting, the sorting speed is increased, and the sorting efficiency is improved.

A particle manipulation system uses a MEMS-based microfabricated particle manipulation device having an inlet channel, an output channel, and a movable member formed on a substrate. The movable member moves parallel to the fabrication plane, like a fluid flowing in the inlet channel. The movable member separates the target particle from the rest of the particle, diverting it into the output channel. However, at least one output channel is not parallel to the fabrication plane. The device can be used to separate target particles from non-target materials in a sample stream. Target particles can be, for example, stem cells, fertilized eggs, cancer cells, T cells, components of blood, bacteria or DNA samples. The particle manipulation system may also include microfluidic structures that focus particles of interest in specific portions of the inlet channel.

The invention discloses a screening device for grading algae subjected to algae suspension aeration continuous culture. The screening device comprises an algae continuous culture device and a screening device body, wherein the screening device body comprises a screening box body and at least one screening net plate, and the screening net plates are arranged in the screening box body and divide thescreening box body into a plurality of screening spaces; a liquid level device is arranged in the screening space located at the end of the screening box body; the screening space is connected with afirst liquid discharging pipe; the hole diameters of the screening net plates are sequentially reduced; a second liquid discharging pipe is arranged on the bottom wall of each screening space which is not connected with the first liquid discharging pipe; and a first electromagnetic valve, a second electromagnetic valve and the liquid level device are all electrically connected with a controller.According to the screening device, the first liquid discharge pipe, the first electromagnetic valve, the at least one screening net plate, the plurality of screening spaces, the second electromagneticvalve and the second liquid discharging pipe are arranged, so that the algae culture solution is discharged into the screening space connected with the first liquid discharging pipe through the firstliquid discharging pipe, and the algae culture solution is subjected to size grading while flowing under the action of liquid level difference.

The invention relates to a method for separating secondary batteries. The method comprises the following steps: (1) selecting a batch of secondary batteries in a full energy state, placing the batch of secondary batteries in a charge-discharge detection device for a lithium ion battery, discharging the secondary batteries in a 3C-10C rate, and recording discharge data by using a computer; (2) setting the low limit of discharge time according to the capacity range of the selected secondary batteries, and classifying the batteries with the discharge time longer than the low limit of discharge time according to a setting range; (3) setting a low limit discharge platform or a low limit mid-value voltage for the selected secondary batteries in the capacity range according to needs to obtain the batteries more than the low limit discharge platform or the low limit mid-value voltage; and (4) carrying out internal resistance separation on the batteries obtained in step (3), and selecting the batteries with satisfactory internal resistances. After the technical scheme is adopted, a separation process is simplified, separation equipment is reduced, the separation speed is increased and the separation quality is improved, the production cost is reduced, and the production efficiency is improved.

The invention relates to the technical field of wood texture classification, and discloses a wood texture extraction and classification method based on image technology. First, an industrial camera is used to collect wood in a good lighting environment, and background removal and grayscale image conversion are performed; The image is filtered and compressed, and then the image is differentiated and binarized, and the small object removal and morphological closing operations are performed on the binarized image. Finally, calculate the eigenvalues ​​of the textures in the image, and use the obtained eigenvalues ​​to make logical judgments to obtain the texture classification results. This method solves the problem that the accuracy of texture classification using statistical methods is not high. The invention can effectively speed up the classification speed and accuracy.

The invention discloses a full-automatic ore sorting system, and relates to the technical field of ore treatment. The system specifically comprises a rack, wherein a sorting barrel is fixedly mounted at the top of the rack, a feeding tube is fixedly mounted at the top of the sorting barrel, a sorting tank is fixedly mounted at one end of the sorting barrel, two liquid inlet tubes are fixedly mounted at the other end of the sorting barrel, and a plurality of solution layering assemblies are mounted in the sorting barrel; and a conveying cylinder is mounted at the bottom of the sorting cylinder. According to the ore and waste ore distribution quantity, the discharging flow is adjusted through an adjusting assembly, re-crosslinking of ores and waste ores at the tail end of equipment is avoided; and meanwhile, in the ore flotation process, a movable frame is driven by a gear ring and a driving motor to rotate around the sorting cylinder, and then the ore flotation efficiency is improved according to the internal ore distribution condition. An electromagnet is switched between the upper end and the lower end, the iron ore sorting speed is increased through magnetic force, and the iron ore sorting efficiency and quality are further improved.

The invention discloses a method, system and device for sorting decommissioned batteries. The method includes: measuring the first open circuit voltage and AC internal resistance of the battery; calculating the first remaining power of the battery according to the measured first open circuit voltage; Calculate the first remaining power, charge or discharge the battery; measure the second open circuit voltage of the battery after charging or discharging, and calculate the second remaining power of the battery; according to the charging and discharging capacity of the battery, calculate the first The remaining power and the second remaining power are used to calculate the remaining available capacity of the battery; to obtain the turning point voltage of the battery charge and discharge curve; to group the batteries according to the remaining available capacity, AC internal resistance, and turning point voltage of the battery. The battery sorting of the invention has high speed, low cost and high efficiency. As a sorting method, system and device for decommissioned batteries, the invention can be widely used in the technical field of battery measurement.

The invention discloses a sorting device of iron ores and belongs to the technical field of mining equipment. The sorting device comprises a conveying mechanism, a separation mechanism, a crushing mechanism, a transportation mechanism and a sorting mechanism, wherein the sorting mechanism is mounted at the tail end of the conveying mechanism; the crushing mechanism is located at the tail end of the separation mechanism; the transportation mechanism is located at two ends of the crushing mechanism; the sorting mechanism is mounted at the tail end of the transportation mechanism; the crushing mechanism comprises a feeding assembly, a crushing assembly, a screening assembly and a driving assembly; the screening assembly is located at the lateral side of the separation mechanism; the crushingassembly is mounted in the screening assembly; the feeding assembly and the driving assembly are mounted at two ends of the screening assembly respectively. According to the sorting device disclosed by the invention, the separation mechanism and the screening assembly are arranged, and waste materials in iron ores can be screened in time, so that a condition that the screening speed and screeningefficiency of the iron ores, caused by the fact that the waste materials are excessive, is avoided and an iron ore sorting step is simplified.

The invention relates to an integrated terahertz superstructure nanobiochip and its application and method. The integrated terahertz superstructure nanobiochip includes a microfluidic filter membrane sorting chip structure and a THz superstructure signal detection module. The fluidic filter membrane sorting chip structure and the THz superstructure signal detection module are connected through a channel equipped with a blocking valve; by combining the principles of filter membrane sorting and antibody capture and fixation, the chip has high sorting efficiency and fast sorting speed. Advantages: By designing a microfluidic lumen of a specific size and a terahertz superstructure detection array, and using fluorine oil to replace surrounding water molecules, the detection sensitivity can be greatly improved, and is suitable for THz of circulating tumor cells (CTCs). Detection; it is of great significance to the integrated, automated and portable detection of CTCs.

A particle manipulation system uses a MEMS-based microfabricated particle manipulation device having an inlet channel, an output channel, and a movable member formed on a substrate. The movable member moves parallel to the fabrication plane, like a fluid flowing in the inlet channel. The movable member separates the target particle from the rest of the particle, diverting it into the output channel. However, at least one output channel is not parallel to the fabrication plane. The device can be used to separate target particles from non-target materials in a sample stream. Target particles can be, for example, stem cells, fertilized eggs, cancer cells, T cells, components of blood, bacteria or DNA samples. The particle manipulation system may also include microfluidic structures that focus particles of interest in specific portions of the inlet channel.